Apparatus for sorting chips.



10.824,141. PATENTED JUNE 264, 1906.

Y H. POWERS.

APA-RATU'SlFOR SORTING CHIPS.

ArPLxcATIoN HLBD JUNE 7, 1905.

`1\I0.s24,141. PATPNTED JUNE 26,1906.

' H. POWERS.

APPARATUS PoR SORTING oH-IPS. APPLIOATION PILED UNE '1, 1906.

' v z SHEETS-snm 2.

nAAnIIliilw IP ScEzEz-:N

ATTORNEYS "HOWARD POWERS, or LiNoOLN, NewV HAMPsuiRn, jAssioeiou orronn- "FIFTHS TO JOUBERTr CONS`-RUCTION CQMPANY, OF

,BERLNi NEW HAMPSHIRE, A CORPORATION OF HAMPSHIRE.

ARP/imma Fon sperme chips.

No, 824,141. f

To all whom vmay,ce1/town Be it Aknown that l, HOWARD lownns, a citizenof the United lStates, and a resident of Lincoln, in the .county ofGrafton and State l of New Hampshiraf'have made certain new yand usefulimprovements in Apparatus for i `Sorting Chips, of which the followingis a ,specifica-tion.

l which separates t e ln the practical preparation 4of wood for makingsul-lite paper-pulp lthe wood is out into chips and qui-te a largeproportion of the chips get through the machine such large sizes thatthey require to be subdivided `orrechipped before being suitable to putinto the digester to cook. All the knotswhich happen to be in the woodare also intermingled with the chips. lt is common to soreengthe chipsto separate the knots 4and large pieces from the chips Vof proper size.but the se aration of the large pieces from the knotsis not so easilyeffected.

separating the-large chips from'the knots, which consists in a tank orreceptacle filled with water, into which the screened out knots andlarge chips are discharged and in which the knots by their greaterspecific gravity sink, while the lighter chips float, 1n combinationwith a series of'perforated pipes arranged close to the water-level, theissue-orifices all lbeing faced in one direction, whereby the floatingchips are continuously carried away byl a surface current produced by aseries of impinging ets of water or air and under the influence of whichthe floatin chips are carried OH over a spillway and de ivered to anelevator to be carried up tothe rechipper, all as hereinafter more fullydescribed with reference to the drawings, in which- K, y

Figure 1 is a side elevation, partlyin s ection, of my new apparatus;and Fig. 2 is a plan view of the same.

A is a tank, canal, or other receptacle which is to be filled with water'and which at one end is made of considerable de th and at the other endhas at its upper leve a shallow spillway A', which inclines downwardlyand outwardly .and over which a shallowsheet of water is constantlyflowing.

B is the dischar e-chute from the screen, little chips from the`larger'ones and the yknots and which chute ,SpecificationofLettersvPatenkt, Application iledl'uile 7,1905. :Serialllol 264,5l08.

l .Patented June .26, 1996.

- delivers the knots ,and large chips into the deep .end of the tank.This receiving .end of the tank iis preferably enlarged horizontaldirection, as seen in Fig.

current of water `1s ,constantl the tank. A branch C', feontro'lked Eby-a valve c, is used to `lill the tank with water to the spillway-leyeland to supply the spillway.

"From the mam ,-supplyepipel@ a series :of

branch pipes D l) descend to near the level of the water the-tank, andat lthe lower .ends these branch pipes bear horizontal crosspipesfclf,that lie close zto the water-level and `which the water issues in aseries of forceful jets always-the samefdirection, and this toward @thespillway AV. "lll-lese -jetspipes are placed close enough -tog-ether tomaintain la surface current toward the spillway, which f i feeds theilo-ating chips .over the .spillway .and My invention consists-in anapparatus for into the elevator `E, which takes them to :the

rechippen "The last .of the `jetfpipes is located to Aplayupon theinclined spillway to keep the chips from clogging on the same.

The branch pipes D are each controlled as toflow of water by valves d,and there may be any desired number of j et-pipes.

As the knots and l'argervchips fall into the tank the knots sink byvirtue of their greater specific gravity and remain at the bottom of thedeepestportion of the tank and are removed from time to time to beutilized for fuel or .other purpose. The knots are thus retained in asort of hydraulic trap, while the chips-are progressively carried overthe spillway. l

After the tank is filled with water the inflow through the pipe C may bediscontinued and the flow through the jet-pipes alone may be suflicientfor the flotation of the chipsV over the spillway; but for the morerapid clearance of the chips from the spillway an inflowl through the pie C is constantly i maintained to give a su icient depth of water on thespillway to float the chips off without cloggin The progress of thelarge chips after t ey strike the water is so rapid that they do notbecome sufficiently wet to require drying before they are ready to go tothe digester, and this is a great advantage, as it saves delay in theprocess of manufacture.

In carrying out my invention it is not nec- C is a watensupply pipevthrougli which .a y flowing -in-to have on one side a series .ofapertures :through IOO essary that the surface movement of the Achipsshould be effected by the jets of water,

for if the inflow of water through the pipe C be maintained insuflicient quantity to float the chips over the spillway the progressivemovement of the chips along the tank-surface to the spillway may beeffected by a blast or streams of air issuing through the jetpipes or bysuitably-placed nozzles.

I do not confine myself to any particular shape of tank, as this may bechanged to suit circumstances.

It will be observed that the jet-pipes are located above the level ofthe spillway and slightly above the level of the water. This involvesthe following distinctive results: first, that these pipes afford noobstruction to the progressive surface movement of the floating chips,but allow them to move rapidly under the jet-pipes and be dischargedover the spillway before the chips have had time to absorb much water,and, secondly, this location of the pipes gives only a surface imovement and does not agitate the lower strata of water, but leaves thelower strata of water quiet and well adapted to the settlement orsubsidence of the heavier knots and their separation from the floatingchips.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. An apparatus for separating chips, comprising a receptacle for a bodyof water, and a series of jet-pipes arranged near the waterlevel butabove the level of the same and having their orifices all faced in onedirection for progressively feeding the chips along the surface of thewater.

2. An apparatus for separating chips, comprising a receptacle for amoving body of water, made deep at one end to retain the heavy sinkablepieces and having a shallow spillway at the other end, and jet -pipesarranged above the level of the spillway and having their orifices allfaced in one direction for producing a current along the surface.

3. An apparatus for separating chips, comprising a tank, a spillway atthe upper level of the tank, a 'water-supply pipe having a plurality ofbranches with valves, one of said branches serving to supply the tankfor maintaining the spillway, and the other branches having jet-pipesarranged above the level of the spillway and having their orifices allfaced in one direction to maintain a surface current toward thespillway.

4. An apparatus for separating chips, comprising a tank, a spillway atthe upper level of the tank inclining downwardly and outwardly, awater-supply pipe having jet-pipes located above the level of thespillway for maintaining a surface current toward the spillway, and oneor more jet-pipes located on the spillway to keep it from clogging.

HOWARD POWERS. g

Witnesses:

WM. E. JOLBERT, MERRILL SHURTLEFF.

